types/array.c

   1 /*
   2  * array.c
   3  *
   4  * BabelTrace - Array Type Converter
   5  *
   6  * Copyright 2010, 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  */
  18
  19 #include <babeltrace/compiler.h>
  20 #include <babeltrace/format.h>
  21
  22 static
  23 struct definition *_array_definition_new(struct declaration *declaration,
  24                         struct definition_scope *parent_scope,
  25                         GQuark field_name, int index);
  26 static
  27 void _array_definition_free(struct definition *definition);
  28
  29 void array_copy(struct stream_pos *dest, const struct format *fdest,
  30                 struct stream_pos *src, const struct format *fsrc,
  31                 struct definition *definition)
  32 {
  33         struct definition_array *array =
  34                 container_of(definition, struct definition_array, p);
  35         struct declaration_array *array_declaration = array->declaration;
  36         uint64_t i;
  37
  38         fsrc->array_begin(src, array_declaration);
  39         fdest->array_begin(dest, array_declaration);
  40
  41         for (i = 0; i < array_declaration->len; i++) {
  42                 struct definition *elem = array->current_element.definition;
  43                 elem->declaration->copy(dest, fdest, src, fsrc, elem);
  44         }
  45         fsrc->array_end(src, array_declaration);
  46         fdest->array_end(dest, array_declaration);
  47 }
  48
  49 static
  50 void _array_declaration_free(struct declaration *declaration)
  51 {
  52         struct declaration_array *array_declaration =
  53                 container_of(declaration, struct declaration_array, p);
  54
  55         free_declaration_scope(array_declaration->scope);
  56         declaration_unref(array_declaration->elem);
  57         g_free(array_declaration);
  58 }
  59
  60 struct declaration_array *
  61         array_declaration_new(const char *name, size_t len,
  62                               struct declaration *elem_declaration,
  63                               struct declaration_scope *parent_scope)
  64 {
  65         struct declaration_array *array_declaration;
  66         struct declaration *declaration;
  67
  68         array_declaration = g_new(struct declaration_array, 1);
  69         declaration = &array_declaration->p;
  70         array_declaration->len = len;
  71         declaration_ref(elem_declaration);
  72         array_declaration->elem = elem_declaration;
  73         array_declaration->scope = new_declaration_scope(parent_scope);
  74         declaration->id = CTF_TYPE_ARRAY;
  75         declaration->name = g_quark_from_string(name);
  76         /* No need to align the array, the first element will align itself */
  77         declaration->alignment = 1;
  78         declaration->copy = array_copy;
  79         declaration->declaration_free = _array_declaration_free;
  80         declaration->definition_new = _array_definition_new;
  81         declaration->definition_free = _array_definition_free;
  82         declaration->ref = 1;
  83         return array_declaration;
  84 }
  85
  86 static
  87 struct definition *
  88         _array_definition_new(struct declaration *declaration,
  89                               struct definition_scope *parent_scope,
  90                               GQuark field_name, int index)
  91 {
  92         struct declaration_array *array_declaration =
  93                 container_of(declaration, struct declaration_array, p);
  94         struct definition_array *array;
  95
  96         array = g_new(struct definition_array, 1);
  97         declaration_ref(&array_declaration->p);
  98         array->p.declaration = declaration;
  99         array->declaration = array_declaration;
 100         array->p.ref = 1;
 101         array->p.index = index;
 102         array->scope = new_definition_scope(parent_scope, field_name);
 103         array->current_element.definition =
 104                 array_declaration->elem->definition_new(array_declaration->elem,
 105                                           parent_scope,
 106                                           g_quark_from_static_string("[]"),
 107                                           0);
 108         return &array->p;
 109 }
 110
 111 static
 112 void _array_definition_free(struct definition *definition)
 113 {
 114         struct definition_array *array =
 115                 container_of(definition, struct definition_array, p);
 116         struct definition *elem_definition =
 117                 array->current_element.definition;
 118
 119         elem_definition->declaration->definition_free(elem_definition);
 120         free_definition_scope(array->scope);
 121         declaration_unref(array->p.declaration);
 122         g_free(array);
 123 }